schoenner



(No Model.)

J. SGHOENNE-R. JTOY STE'A'M'ENGINE.

No. 506,447. Patented Oct. 10,1893.

-wmllugllll UNrrEn STATES PATENT JEAN SCHOENNER, OF NUREMBERG, GERMANY.

TOY STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 506,447, dated October10, 1893. Application filed April 29, 1893. Serial No. 472,350- (Nomodel.) Patented in Germany March 24. 1892, No. 67.253.

To all whom it may concern.-

Be it known that I, JEAN SOHOENNER,1naX1\1- facturer, a subject of theGerman Emperor, residing at Nuremberg, in the Kingdom of Bavaria, Empireof Germany, have invented certain new and useful Improvements in ToySteam-Engines, of which the following is a specification.

This invention was patented in Germany March 24:, 1892, No. 67,253.

This invention has for its object to provide valve arrangements for toysteam engines, whereby it will be possible to make these lat+ ter withfixed, instead of, as is generally customary, with oscillatingcylinders, but yet both as regards simplicity and mode of mak-v ing canbe suitably employed for toys. In order to attain these objects, anarrangement of parts is employed in which, however, in contradistinctionto existing similar arrangements, there is not required a special valvecase or box.

On the accompanying drawings,Figure 1 is a side view of one form of myinvention. Figs. 2 and 3 are longitudinal sectional views of the sameshowing two positions of the valve. Fig. dis a central transversesectional view of the cylinder and valve. Fig. 5 is a longitudinalsectional View illustrating the preferred form of the invention. Fig. 6is a similar View illustrating a slight modification thereof. Fig. 7 isa transverse sectional view of the form of the invention shown in Fig.5.

Figs. 1 to 4 show a cylinder of a toy steam engine fitted according tothis invention, and this improved arrangement consists as follows:A sidepiece A is cast on the steam cylinder A in which the steam passages orports are made. These maybe enumerated as follows:-The steam admissionchannel a and the two transit passages 11 and c. The steam is admittedat the side by means of a nozzle d, turns at right angles, and opens ata into the middle of the valve face A The transit passages are separatedfrom the opening a by means of cross bars or pieces 6 e, and in realityare only grooves or gutters cut out or formed in the face of the sidepiece A. This is of special importance for the formation of theapparatus from one piece. At both ends, the grooves or gutters areconnected by means of rectangular ports I) o with the interior of thesteam cylinder. The steam distribution is effected by means of a valveplate f with the recess g corresponding to the inlet opening a. Thisrecess, on the movement of the valve, alternately places the opening ain communication with one or other of the passages b and c. The exhauststeam escapes direct into the open air through the ports I) c. The valvef sliding on the face A? is, in other respects a flat plate and is madeof such a length that it also forms the cover for the passages 17 c. Itis set in motion in the usual manner by means of an eccentric from thecrank axle and is guided on both sides by the ledges ZZ formed on thecast iron piece A. In order that the valve may fit steam tight, it ispressed againstits facing or seating by means of a fiat spring hfastened over it.

The mode of working of the arrangement hereinbefore described, which isshown in an end position in Fig. 2, is as followsz-On the engine movingin the direction indicated by the arrow, the connection of the steaminlet passage or with the passage b is established by means of therecess g; the steam passes behind the piston and drives the sameforward. At the same time with this movement, an opening 'i in the valvecoincides with the port 0', so that, as the piston moves forward, theexhaust steam can escape through the opening i into the open air. 7 Whenthe piston hasreached the end of its stroke, fresh steam is admitted tothe passage 0 through the recess g, and simultaneously the rear edge fof the valve passes away from off the port 17', by which means thelatter is left open, and thus the exhaust steam can freely escape'atthis side.

The valve f may have another sectional form to that given above, forinstance, it may be of a round or oval cross section, but then the formor shape of its facing or seating must be made to correspond. Also, inorder to simplify the putting together of the main parts, in place ofthe longitudinal fiat valve f, a slide valve F, formed as a cylindricalpiston may be employed, the facing orseating A of which iscorrespondingly formed as a hollow cylinder, see Figs. 5 to 7 of theaccompanying drawings. The hollow chamber g,

Valve may be kept to its seating in a similar Way to the arrangementhereinbefore described, by means of the diagonal spring 7L which mayonly be fastened at one side.

I declare that what I claim is 1. An improvement in toy steam engineswith fixed cylinders, consisting in the combination, with a steam inletpassage a and passages b and 0, formed as described, of a valve ofsuitable cross section, forming the covering for the passages 72 c, andhaving a recess 9 whereby the said passages can be placed alternately inconnection with the steam inlet, substantially as described.

2. In toy steam engines such as described, a round piston valve 1fitting a correspond ingly shaped facing or seating A the said valvehaving a hollow space g formed as described, whereby the steam inletpassage can be connected with the transit passages, substantially asdescribed.

JEAN SOl-IOENNER. Witnesses:

WM. J. BLACK, OSCAR Boon.

